Effects of Non-Sinusoidal Current PhaseRelationships on Single Flux Quantum Circuits

Published

March 1, 2024

Author(s)

Miranda Thompson, Manuel Castellanos Beltran, Pete Hopkins, Paul Dresselhaus, Samuel Benz

Abstract

While the relationship between current and phase in a Josephson junction is canonically assumed to be sinusoidal, both the materials of the electrodes and the properties of the barrier will influence this relationship. This current-phase relationship (CΦR) is investigated here in terms of circuit operation for simple digital circuits based on single flux quantum (SFQ) logic. It is found that changing the CΦR changes the timing of SFQ pulses, thereby changing the timing and current margins of JTL and T flip-flop circuits. This study motivates the investigation of CΦRs for various junction technologies in order to correctly simulate and optimize Josephson-junction-based circuits.

Citation

Transaction on Applied Superconductivity

Volume

33

Issue

2

Pub Type

Journals

Download Paper

https://doi.org/10.1109/TASC.2022.3223853

Local Download

Keywords

Josephson junctions, Current-phase relationship, single flux quantum circuits

Citation

Thompson, M. , Castellanos Beltran, M. , Hopkins, P. , Dresselhaus, P. and Benz, S. (2024), Effects of Non-Sinusoidal Current PhaseRelationships on Single Flux Quantum Circuits, Transaction on Applied Superconductivity, [online], https://doi.org/10.1109/TASC.2022.3223853, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=935181 (Accessed December 13, 2024)